Electromechanical gong.



No; 757,271; PATENTED APR. 12, 1904 F. W. COLE.

ELECTROMEOHANIGAL GONG. APPLIOATION FILED 0914,1902.

N0 MODEL Jim??? Z02".

Patented April 12, 1904.

I esign some NEWTON. MAs'sAciius-FJTTS,nssienonirofunirnn f gsrrnrnsFIRE AND rouse- TELEGRAPH GOMPANY, or BOSTQN,.=MASSA- I IQHUSETTfi.AyGORPORATlON on IN i f e d+nonecemcki Leone, i

SPECIFIGATION, formingpart orneitersrghcno,vs'fiefii, dateqia r'ii12,,1'904.

Beit; known:- that I, newsman W of Newton, county of Middlesex,- Stateof' I Massachusetts,..,have invented an Improve} vInent,inElectromechanical; Gongs, of which,

(the following description, in connection with Qtheaccompanyingdrawings, is a. specification, like, characters on the drawingsrepresenting like parts; 1

;1o 4 This invention'grelates to electromechanical 1o;lingdevice'=-in-'=engagement with the parts t6 1thold=the actuatingmechanism at'rest and gma tnre to'move the controlling device to set Ifreetheactuat1ng mechanism; also to provide if- 2 5 Fm'eansyfor.restoringvsaid governing device and -armature and parts connected with"said armature .ada'ptednto .beioperated by oneof:thepoweredriven\partsfias, for1instance,"the

strikearmr also'to project the w-inding-shaft Aerating parts are-placed.A p r Figure 1 shows in front elevation an electromechanical gongembodying figthis invention, the gong, which is struck by the ham- 0'through the gong, beneath which C all the opm'er, being removed todisclose the operating mechanism. Fig.=. 2 is v a vertical section ofthe": gongv shown-in :Eig. l1, taken onwthe dotted: line 252-, Fig.;1-.-Fig. 5 is adetail showing both governing device and controlling de- 4wiceiin their abnormal positions and thestriking-arm,- which has beendisengaged; travelingpn its :backwaid *st'rok'e. Fig; 4 is" a detailof=the "parts shown in Fig. 3', the control:

- ling device' and governingjd'evice I both being W5 restored to -theirnormal positlonsjrand' the striking-arm being irfitsmost remotepositiongaway fromthegongm ixTllB 'specialf type' 'of gong here n-shown,- to

:ployed. when;in-another position/it permits the ar- ,llsar n elmets, onmail} 1 Y iiwhich my improvements are applied, ordinarily termed aiturtle gong and comprises a shell or case a,s'uitable supportsthereinfor .the operating parts, and a gong 6, yet. my improvements'areapplicable to "other types of In the gong shown a boss 4 is formed onthe frame, from which projects'an externally-screw-threaded teat an,adapted to re- ,ceive a nut a, and the gong b has a hole through it,through which said "teat, passes, so that said gong rests upon the boss21'. A hole is provided through the boss and teat -for-the winding-shafta of the actuating -mechanism', said shaft being provided with: a squareend, adapting it'to' receives suitable 'key. Inother "types of gon'gstowhich my improvements are applicable of course this particularconstruction of support for the gong and provision for winding theactuating mechanism Will -The actuating mechanismfor the'pivotedstriking armor lever '0, bearing thebell-hammer, consists, essentially,of a'ratchet toothed wheel Z,'jsecured directly to the winding-shaft a,and a springd, one end of which is connected 'withsaid winding-shaft andthe: other end with a post (1. Two pa'w'ls c a are pivotally connectedto the striking-arm, one at not necessarily be emeach side of the pivotof said arm, which engage said ratchet toothedwhe'el' dandwhich areoperated by said wheel to in turn operate the striking-arm. 'Ihefpawl0'-.h'a's a" pine projecting laterally from 'it, "upon which the freeend of a spring a bears, the action offs-aid spring being to throw thepawl down, so that the pine will strike a fixed point-as, for instance,one side of a block c "and thereby disengage thepawl from theratchet-wheel and "limit its movement away from the ratchet;

-wheel,""-- t i The pawl ohas a pin cf projecting laterally {from it,which occupies a position'between the ends of "two'flat'spring's o a,attachedto said block 0, the tendency of the uppermost spring a being tolower thej'pawl and therebydisengage it from the ratchet-wheel, and thetend: encyof the lowermost spring being liftthe stance, normally thelowermost pawl c is in engagement with the ratchet-wheel and theuppermost pawl c is out of engagement therewith, and as the actuatingmechanism is set free the ratclietm'lieel will thrust the pawl c IQ in adirection to. move the strihingmrm c away 1 from the gong, and -suchmovement of the arm causes the pawl c to approach the ratchet-- wheel atthe same time one of the teeth of the ratchet-wheel approaches the pawl,and when 5 the ratchet-wheel hasmoved the pawl 0 a short distanco---fa renough for the pawl c to be brought into engagement with the ratchetwheel the spring will act to, disengage the pawl c'" from theratchet-wheel, andthen as the ratchet-wheel continues its revolutionthcpawl I." will be moved in a: direction to move the striking-armtoward the gong, and such movementnvill continue until the spring a"disengages said pawl c from the ratchet-wheel, at

5 which time the pawl is again brought into ei'igagemcnt with theratchet-wheel. Thus the striking-arm will be moved first away from andthen toward the gong, making one complete excursion each time theactuating 3O mechanism is lot oil.

The outer end of the striking-arm c is formed or provided with a detentwhich is engaged by a controlling device which, as herein slmwn,consists ol a let-off. comprising, essentially, a

a pawl pivoted at to a'n'arm c, pivoted at w'", the extremity of whicharm is loosely .ct'mnoctcd by a link w' with the upper end of thearmature t". The armature c" is pivoted ail-" and has attached to it arctractile spring 4 a, the tendency of which is to move said armatureaway-from the poles of the electrohenover the armatureisv retractedatatime when not restrained from oporation by a governing device'to bedescribed,

5 the arm w will be turned on its pivot and the let-oli' will be movedout of engagement with the detent w'", (see Fig. 3,) to thereby releasethe striking-arm and set free the actuating mechanism for saidstriking-arm. It is denormally hold the controlling device in its normalposition /.-w., with the let-oil in engagement with the detenton thestriking-arm, to thereby hold the actuatingmechanism at rest and thatsaid armature shall at such time be held by its retractile sping in asemiretracted position against or in engagement.

with the governing device to be tilcscribed and that whenevcrsaidarmature is attracted the governing device shall move out of the way,

so that when said armature is retracted with the governing device out ofthe way it will retract' its fulhsn-oke and when so doing will move thecontrolling device out of engage- 5 ment with the striking arm, and thatthereits opposite end engages the armature.

dog.

reason of the loose connection with the armprojection serves as a stopfor limiting the movement of the governing device in one direction, andwhen. the dog is in this position positionshown in Fig. 3. To assist inholding the dog in its elevated position,as shown in Fig.

The

1, the armature is provided or formed with a. shallow recess 0*, whichreceives the end of the The armature is free to be attracted by a. Afterthe armature has been attracted and the. dog has dropped out ofengagement with it into the position shown in Fig. 3--then as thearmature retracts, there being no obstruction to oppose such movement,the arma ture will retract its fnllstroke, drawing upon the link 0 arm 0and disengaging the controlling device from the striking-arm, as shownin Fig. 3, and the parts will remain in this position until mechanicallyrestored, which of course takes place immediately preparatory to thegong responding to another electrical impulse. Thus it will be-seen thatthe dog drops out of engagement with the armature whenever the torestore the parts. a

A bent arm n is loosely attached to a projectionv on the striking-armnear the pivot 50 signed and intended that the armature shall thereof,which passes up by and beyond the short arm F of the dog andthrough ahole in a projection 17 on the frame, the outer or free end of said armbeing thus guided by said projection, and an offset or bend is formed orprovided in said arm at n, which normally occn' pies a position abovethe short arm 1'' of the dog but which when the dog 5 falls serves as astop against which said short arm strikes,

so that the dog will be engaged by said bent arm )1 whenever it fallsinto its'abnormal position; but as soon as the said dog falls and andthereby drawingdown the the actuating mechanism released thestriking-arm will be moved away from the gong, andduring this movementof the strikingarm it operates to draw down the arm n 1n the directionof its length and to' return the dog to its normal position, as showninFig. 4.

The dog, which has been restored to its normal position by the drawingdown of the arm n, will remain in such position by the pressure of thearmature upon it. Thus the governing device is restored by the strikingarm during the movement of said arm away from thegong. As the dog isrestored to its normal position by the arm n it engages the armature,which-at suchtime occupies its full retracted position, as shown .inFig. 3, and. positively moves said armatureback to its normal position,as shown'm Fig. 1, near to but not in engagement with'the poles of theelectromagnet 0 thereby returning said ar- 1 mature to its semiretractedposition, and such movement of the armature causes the arm a toalso-resume its normal position, so that the controlling device Wlll berestored or moved into a position to be engaged by the detent 0 on thestriking-arm when said striking-arm again arrives at the end of itsexcursion and has struck a blow. Thus the governing device serves as arestoring device for the armature and for the controlling device as wellas determines or governs the position of said con trolling devicerelative tothe striking-arm.

a I do not desire to limit my inventionto many of the details ofconstruction herein described, asit. is obvious that. many changes maybe scope of my in-- made which come within the vention. Y o t g Havingthus described my invention, what I claim asnew, and desire to secure byLetters Patent, is-

1. In an electromechanical gong, the combi-d nation of a. striking-arm,actuating mechanism therefor, a let-oflengaging said arm, an elecetromagnet, an armature therefor which is connectedwithsaid let-01f andwhich operates said let-off to release the striking-arm when moved intoits, full retracted position, adog engaging'said armature for "holdingit in its semiretracted position, which 1s released by said armaturewhen the latter is moved into its attracted position, and when released,permits saidarmature to move into its full retracted position, andmeans, operated by the striking: arm for restoring said dog,substantially as described. 1

2, vInan electromechanical gong, the combination of a striking-arm,actuating mechanism therefor,a pivoted let-oil engaging said arm, anelectromagnet, an armature therefor, an

unyielding link connectingsaid armature with an electromagnet,.anarmature therefor, an-

unyielding link connecting said armature with said let-off, saidarmature operating to more said let-off when moved into its fullretracted pos1t1 on, a.dog engaging said armature for holdingit in itssemiretracted position, which is released by said armature when thelatter s moved into its attracted position, and hen released disengagessaid armature permit 1 in;-

it to move into its full retracted position, and means, operated by thestriking-arm, i'or o erating said dog to restore the armature andpartsconnected therewith, substantially as described.

' 4. In an electromechanical gong, theeombination of a striking-arm,actuating mecliianism therefor, a let-otf engaging said arm, anelectromagnet, its armature, and an unyielding link connecting said.let-ofl' with said-armature, whereby the let-oif is positively moved'-.in both directions, and also held by the arma- 'ture, substantiallyas described. a

5.. In an electromechanical gong, the combination of a striking-arm,actuating mechanism therefor, .a pivoted let-01f engaging said arm,consisting of a pivoted dog 0 and a pivoted arm bearing it, anelectromag'net, its armature, and an unyielding link connecting the armbearinglthe let-ofi with said armature, whereby the let-off ispositively moved in both directions and also held by the armature,substantially vas described.

In testimony whereof I have signed my name to this specification in thepresence of two subscribing witnesses.

FREDERICK COLE.

Witnesses; I

B. J: NoYEs, H. BQDAVIS.

